US2763267A - Smoke filter of fibrous material, especially for tobacco products - Google Patents

Smoke filter of fibrous material, especially for tobacco products Download PDF

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Publication number
US2763267A
US2763267A US321118A US32111852A US2763267A US 2763267 A US2763267 A US 2763267A US 321118 A US321118 A US 321118A US 32111852 A US32111852 A US 32111852A US 2763267 A US2763267 A US 2763267A
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Prior art keywords
strata
filter
lter
fibers
axis
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US321118A
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English (en)
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Muller Paul Adolf
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    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/04—Tobacco smoke filters characterised by their shape or structure

Definitions

  • the smoke filters now predominantly in use consist of a multi-layer strip of creped material folded in the longitudinal direction of the lter.
  • the lter material consists, for instance, of creped multi-layer tissue paper or creped cellulose wool with or without intermediate layers of ltering or absorptive materials such as cotton tissue. These filters have distinct longitudinal passages through which the smoke may pass unobstructed and hence unltered. Consequently, the ltering is far from perfect.
  • absorbent substances such as activated charcoal also failed to bring satisfactory results as the, absorbent substances are partly loosened during smoking and inhaled together with the noxious substances.
  • smoke lter bodies are made from dried wood cellulose pulp with a promiscuous ber orientation so that there are no through passages in the longitudinal direction of the lter body. While such lters have good ltering qualities, they are not entirely satisfactory because, when using only wood cellulose ber pulp, the permeability of the lter is generally too slight. It is therefore necessary to increase the permeability to an acceptable measure by applying particular manufacturing expedients which, however, also increase the cost of the lter body.
  • My present invention has for its object to provide a lter body which o'ers all advantages of the last-mentioned type of lters but avoids its disadvantages.
  • the individual strata of ber material are generally parallel and extend perpendicularly or slanted to the longitudinal direction of the filter body.
  • the denser strata dierent thicknesses for instance, in such a manner that the denser strata in the middle portion of the lter body are thicker than those near the ends, or vice versa.
  • the strata of ber material may be disc shaped or cone shaped, the cone axis in the latter case extending in the longitudinal direction of the lter body. Within the same lter body the strata may have all about the same shape, or their shapes may be different.
  • the strata may have the shape of a at disc perpendicular to the lter axis, while gradually changing into conical shape toward the other lend of the body, the cone axes extending generally lengthwise of the lter body.
  • ber material is a cellulose ber material, particularly wood cellulose ber material.
  • other cellulose bers may be added to the wood cellulose ber material. It is then preferable to limit the quantity of such additions to at most 50% by Weight of the entire ber material.
  • Suitable as such additions are especially cotton bers and/ or wood bers.
  • Suitable as ber materials, particularly as additions to a wood cellulose ber material are also brous substances of inorganic, for instance mineral character, such as asbestos bers, or articial materials such as nylon.
  • FIG. l illustrates schematically and on an enlarged scale av longitudinal section through part of a stratied lter body, while Figs. 2 to 9 show schematically and in-section eight different modications respectively.
  • the lter body 11 is composed of strata 12 of ber material felted together by strata 13 of lesser density so that the stra-ta 12 are distinctly perceptible. Within and between the strata 12 the bers are promiscuously distributed, that is they have no preferred orientation so that there is no continuous ber strand in the longitudinal direction of the lter body.
  • Figs. 2 to 9 Various kinds of arrangement and shape of the ber strata within a lter body, for instance, of the length L, are apparent from Figs. 2 to 9.
  • the lter body according to Fig. 2 consists of at disc-shaped strata 12 of ber material parallel to each other and perpendicular to the longitudinal direction of the lter body.
  • Thelayers are felted together at 13 by strata of lesser density and are thus joined together to a coherent unit.
  • the lter body according to Fig. 3 has brous strata 12 which are about shell shaped, having a bulge in rough approximation to a cone.
  • the conical shape is more clearly apparent in the embodiment of Fig. 4.
  • the cone axes :of the strata extend longitudinally of the lter body but these axes need not coincide with the longitudinal center axis of the lter body.
  • the fibrous strata 12 and the intermediately located fibers serving to establish coherence of the strata 12, consist preferably of cellulose fibers, particularly fibers of wood cellulose.
  • cellulose fibers particularly fibers of wood cellulose.
  • other cellulose fibers may be added to the Wood-cellulose fiber material, for instance cotton fibers and/or wood fibers, for the purpose of loosening the texture.
  • the described smoke filter bodies are substantially free of through passages and through-going fiber strands parallel to the filter axis thus securing good and uniform smoke-filtering qualities.
  • These filters are also advantageous as regards manufacturing requirements and cost, because each filter body consists of a single mass, in contrast to many known filters that are composedv of different materials whose assembly increases the cost of the manufacturing process and hence of the product.
  • One of the manufacturing methods for producing the above-described filters is as follows. A wet pulpy mass of the fibrous material, well mixed or vibrated to secure a promiscuous fiber orientation, is drained from a container through a waterpermeable tubular structure, and sufficient pressure is applied to the structure to eliminate much of the water from the pulp. As a result, a strand or sliver is issued. This sliver is subjected to drying and shaping under application of a periodically varying pressure to produce alternately dense and loose strata that remain coherent. A process and machinery applicable for the production of such filters is described in my copending application Serial No. 366,316, filed July 6, 1953. However, it will be understood that the particular manufacturing method is not essential to the present invention and that other methods suitable to stratify the filter may also be used.
  • a tobacco smoke filter for smoking articles comprising a multiplicity of discernible strata extending transverse to the filter axis and consisting all of the same filter material, said strata having alternately larger andsmaller densities respectively, said filter material in each of said strata consisting of a mass of individual, promiscuously oriented fibers and having substantially the same density throughout said mass, said respective strata being felted together and forming together a coherent filter body, at least one of said strata of larger densityextending continuously over the entire cross section of the filter body so that said body is free of any through passages parallel to the filter axis.
  • a tobacco smoke filter for smoking articles comprising a multiplicity of discernible strata all extending substantially parallel to one another over the entire cross section of the filter in a direction transverse to the filter axis and all consisting of the same filter material, said strata having alternately larger and smaller densities respectively, said filter material in each of said strata consisting of a mass of individual fibers promiscuously oriented to exclude through passages parallel to the filter axis, said mass having substantially uniform density throughout each individual stratum, and said respective strata being felted together and forming together a coherent filter body.
  • a tobacco smoke filter for smoking articles cornprising a multiplicity of discernible strata all extending substantially parallel to one another over the entire cross section of the filter in a direction slanted, at least in part, with respect to the filter axis, said strata consisting all of the s'ame filter material and having alternately larger and smaller density respectively, said filter material in each of said strata consisting of a mass of individual fibers promiscuously oriented to exclude through passages parallel to the filter axis, said mass having substantially uni- 4 form density throughout each individual stratum, and said respective strata being felted together and forming together a coherent filter body.
  • a tobacco smoke filter according to claim 2 said filter body having an axially elongated cylindrical shape of a flat disc and extending substantially perpendicularly to the filter axis.
  • a tobacco smoke filter for smoking articles comprising a multiplicity of discernible strata all extending substantially parallel to one another over the entire cross section of the filter in a direction transverse to the filter axis, each of said strata having the shape generally of a hollow cone with the cone axis parallel to the filter axis, said strata consisting all of the same filter material and having alternately larger and smaller density respectively, said filter material in each of said strata consisting of a mass of individual fibers promiscuously oriented to exclude through passages parallel to the filter axis, and said respective strata being felted together and forming together a coherent filter body.
  • said filter body having elongated cylindrical shape, the strata at one axial end of said filter body having substantially fiat shape and extending perpendicularly to the longitudinal axis of the body, and the other strata having a shape gradually varying into cone shape toward the other end of the body, the cone axis extending approximately lengthwise relative to the body.
  • a tobacco smoke filter for smoking articles comprising a multiplicity of discernible strata extending transverse to the filter axis and consisting all of the same filter material, said strata having alternately larger and smaller densities respectively, and said strata of larger density being axially thicker than said strata of smaller density, said filter material in each of said strata consisting of a mass of individual promiscuously oriented fibers and having substantially the same density throughout said mass, said respective strata being felted together and forming together a coherent filter body of substantially cylindrical, elongated shape, and said strata extending continuously over the entire cross sectiony of the filter body.
  • said fibers in'all said strata consisting of wood-cellulose fibers.
  • said fibers in all said strata consisting of a mixture of woodcellulose fibers and other cellulose fibers amounting up to about one-half by weight of the total mixture.

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  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Filtering Materials (AREA)
  • Nonwoven Fabrics (AREA)
US321118A 1951-11-27 1952-11-18 Smoke filter of fibrous material, especially for tobacco products Expired - Lifetime US2763267A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH719439X 1951-11-27

Publications (1)

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US2763267A true US2763267A (en) 1956-09-18

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US321118A Expired - Lifetime US2763267A (en) 1951-11-27 1952-11-18 Smoke filter of fibrous material, especially for tobacco products

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US (1) US2763267A (en(2012))
BE (1) BE528827A (en(2012))
DE (1) DE960788C (en(2012))
FR (1) FR1083423A (en(2012))
GB (1) GB719439A (en(2012))

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2834354A (en) * 1955-03-25 1958-05-13 Rosenberg Elias Filtering material for tobacco smoke
US2881772A (en) * 1956-02-29 1959-04-14 Eastman Kodak Co Tobacco smoke filters
US2909182A (en) * 1954-12-09 1959-10-20 Pluess Staufer North American Tobacco smoke filters
US2917054A (en) * 1955-04-22 1959-12-15 Eastman Kodak Co Fibrous tobacco smoke filter containing solid additive
US2956329A (en) * 1954-12-15 1960-10-18 Eastman Kodak Co Manufacture of filamentary tobacco smoke filter
US2968306A (en) * 1956-02-29 1961-01-17 Eastman Kodak Co Tobacco smoke filter capable of selective removal of aldehydes
US3008474A (en) * 1959-04-13 1961-11-14 Eastman Kodak Co Tobacco smoke filter containing a sugar ester
US3026226A (en) * 1957-12-09 1962-03-20 Eastman Kodak Co Process of manufacturing filters
US3033212A (en) * 1959-04-17 1962-05-08 Eastman Kodak Co Tobacco smoke filter containing polyolefin cobweb additive
US3043736A (en) * 1959-03-02 1962-07-10 Eastman Kodak Co Method for making additive filters
US3062219A (en) * 1961-02-06 1962-11-06 Miller Benard Cigarette filter
US3079929A (en) * 1958-08-09 1963-03-05 Mueller Paul Adolf Filter plugs for cigarettes
US3105500A (en) * 1959-08-04 1963-10-01 American Cyanamid Co Soil retaining finish for textiles
US3232294A (en) * 1962-03-05 1966-02-01 Nat Lead Co Tobacco smoke filter
US3256372A (en) * 1964-04-28 1966-06-14 American Can Co Method for preparing modified cellulose filter material
US3268084A (en) * 1958-12-04 1966-08-23 Celanese Corp Bulked non-wovens
US3809097A (en) * 1971-07-27 1974-05-07 B Clayton Tobacco smoke filter
US4197863A (en) * 1974-05-02 1980-04-15 Benjamin Clayton Tobacco smoke filter
US5509429A (en) * 1989-03-02 1996-04-23 Kothmans, Benson & Hedges Inc. Uniform tar delivery profile filter

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1109073B (de) * 1957-11-04 1961-06-15 Erna Doering Zigarettenfilter
US3119396A (en) * 1961-05-24 1964-01-28 Minnesota Mining & Mfg Tobacco smoke filter
JPS55135581A (en) * 1979-04-12 1980-10-22 Mitsubishi Rayon Co Plug for tobacco filter

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE166614C (en(2012)) *
US956832A (en) * 1909-01-12 1910-05-03 Theobald Friedrich Seitz Filter.
US1411975A (en) * 1920-03-09 1922-04-04 George W Matson Filtering material
US1807521A (en) * 1924-07-12 1931-05-26 Public Service Company Apparatus for cleaning gas
US1862659A (en) * 1930-04-12 1932-06-14 Christofferson Charles Filter
US2521985A (en) * 1948-09-16 1950-09-12 American Felt Co Process of making fibrous units
US2586935A (en) * 1948-03-26 1952-02-26 Fram Corp Gas filter

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB406401A (en) * 1932-10-03 1934-03-01 Abraham Wix Improvements in or relating to cigarettes
CH276403A (fr) * 1948-11-10 1951-07-15 Pouterman Elie Bout pour cigarette et procédé de fabrication de ce bout.

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE166614C (en(2012)) *
US956832A (en) * 1909-01-12 1910-05-03 Theobald Friedrich Seitz Filter.
US1411975A (en) * 1920-03-09 1922-04-04 George W Matson Filtering material
US1807521A (en) * 1924-07-12 1931-05-26 Public Service Company Apparatus for cleaning gas
US1862659A (en) * 1930-04-12 1932-06-14 Christofferson Charles Filter
US2586935A (en) * 1948-03-26 1952-02-26 Fram Corp Gas filter
US2521985A (en) * 1948-09-16 1950-09-12 American Felt Co Process of making fibrous units

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2909182A (en) * 1954-12-09 1959-10-20 Pluess Staufer North American Tobacco smoke filters
US2956329A (en) * 1954-12-15 1960-10-18 Eastman Kodak Co Manufacture of filamentary tobacco smoke filter
US2834354A (en) * 1955-03-25 1958-05-13 Rosenberg Elias Filtering material for tobacco smoke
US2917054A (en) * 1955-04-22 1959-12-15 Eastman Kodak Co Fibrous tobacco smoke filter containing solid additive
US2881772A (en) * 1956-02-29 1959-04-14 Eastman Kodak Co Tobacco smoke filters
US2968306A (en) * 1956-02-29 1961-01-17 Eastman Kodak Co Tobacco smoke filter capable of selective removal of aldehydes
US3026226A (en) * 1957-12-09 1962-03-20 Eastman Kodak Co Process of manufacturing filters
US3079929A (en) * 1958-08-09 1963-03-05 Mueller Paul Adolf Filter plugs for cigarettes
US3268084A (en) * 1958-12-04 1966-08-23 Celanese Corp Bulked non-wovens
US3043736A (en) * 1959-03-02 1962-07-10 Eastman Kodak Co Method for making additive filters
US3008474A (en) * 1959-04-13 1961-11-14 Eastman Kodak Co Tobacco smoke filter containing a sugar ester
US3033212A (en) * 1959-04-17 1962-05-08 Eastman Kodak Co Tobacco smoke filter containing polyolefin cobweb additive
US3105500A (en) * 1959-08-04 1963-10-01 American Cyanamid Co Soil retaining finish for textiles
US3062219A (en) * 1961-02-06 1962-11-06 Miller Benard Cigarette filter
US3232294A (en) * 1962-03-05 1966-02-01 Nat Lead Co Tobacco smoke filter
US3256372A (en) * 1964-04-28 1966-06-14 American Can Co Method for preparing modified cellulose filter material
US3809097A (en) * 1971-07-27 1974-05-07 B Clayton Tobacco smoke filter
US4197863A (en) * 1974-05-02 1980-04-15 Benjamin Clayton Tobacco smoke filter
US5509429A (en) * 1989-03-02 1996-04-23 Kothmans, Benson & Hedges Inc. Uniform tar delivery profile filter

Also Published As

Publication number Publication date
DE960788C (de) 1957-03-28
FR1083423A (fr) 1955-01-10
BE528827A (en(2012))
GB719439A (en) 1954-12-01

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